/* =========================================================
   环亚体育登录 · 共享样式 /assets/site.css
   高原暮色体系：深靛蓝底 + 暖橙琥珀灯光 + 青蓝翡翠点缀
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --c-ink:#0B1B33;
  --c-night:#122B4A;
  --c-orange:#F28C28;
  --c-amber:#FFB347;
  --c-cyan:#4FC3F7;
  --c-jade:#2E8B74;
  --c-copper:#B98A4A;
  --c-mist:#F4F7FB;
  --c-slate:#8A9BB5;

  --c-line:rgba(185,138,74,.28);
  --c-line-soft:rgba(244,247,251,.10);
  --c-line-cyan:rgba(79,195,247,.22);

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-narrow:"Oswald","Barlow Condensed","Arial Narrow","Noto Sans SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,52px);
  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --space-block:clamp(48px,7vw,104px);
  --shadow-lift:0 22px 48px rgba(4,11,22,.45);
}

/* ---------- 2. 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-ink);
  color:var(--c-mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,picture,svg,video{display:block;max-width:100%;height:auto}
a{color:var(--c-amber);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--c-orange)}
button{font:inherit;color:inherit}
ul,ol{margin:0 0 1em;padding-left:1.2em}
::selection{background:rgba(242,140,40,.35);color:var(--c-mist)}
#main-content{display:block;min-height:50vh;scroll-margin-top:132px}
#main-content:focus{outline:none}

:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px;border-radius:6px}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4,h5{margin:0 0 .6em;font-weight:600;line-height:1.24}
h1{font-family:var(--font-serif);font-size:clamp(30px,4.4vw,54px);letter-spacing:.01em}
h2{font-family:var(--font-serif);font-size:clamp(24px,3vw,38px)}
h3{font-family:var(--font-narrow);font-size:clamp(18px,2.1vw,24px);letter-spacing:.05em}
h4{font-family:var(--font-narrow);font-size:17px;letter-spacing:.08em}
p{margin:0 0 1em}
small{font-size:13px;color:var(--c-slate)}
strong{font-weight:600;color:var(--c-mist)}

.display{font-family:var(--font-serif);font-weight:600;line-height:1.16;font-size:clamp(32px,4.6vw,58px);margin:0 0 .5em}
.display em{font-style:normal;color:var(--c-amber)}
.title-narrow{font-family:var(--font-narrow);font-weight:700;letter-spacing:.06em;margin:0 0 .5em}
.lede{font-size:clamp(16px,1.15vw,19px);color:var(--c-slate);max-width:62ch;margin:0 0 1.2em}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--c-copper);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor}
.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--c-copper),rgba(185,138,74,0))}
.prose{max-width:68ch}
.prose h2{margin-top:1.5em}
.prose li{margin-bottom:.4em;color:var(--c-slate)}

/* ---------- 4. 布局 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--space-block)}
.section--tight{padding-block:calc(var(--space-block) * .55)}
.section--flush{padding-block:0}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}

/* ---------- 5. 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--c-mist);
  --btn-bd:rgba(244,247,251,.26);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid var(--btn-bd);border-radius:999px;
  background:var(--btn-bg);color:var(--btn-fg);
  font-family:var(--font-narrow);font-size:15px;font-weight:600;letter-spacing:.1em;
  cursor:pointer;text-decoration:none;
  transition:transform .25s ease,background-color .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.btn:hover{transform:translateY(-2px);color:var(--btn-fg)}
.btn:active{transform:translateY(0)}
.btn--primary{
  --btn-bg:linear-gradient(135deg,var(--c-orange),var(--c-amber));
  --btn-fg:#08152A;--btn-bd:transparent;
  box-shadow:0 14px 30px rgba(242,140,40,.26);
}
.btn--primary:hover{box-shadow:0 18px 38px rgba(242,140,40,.34)}
.btn--ghost{--btn-bd:rgba(79,195,247,.45);--btn-fg:var(--c-cyan)}
.btn--ghost:hover{--btn-bg:rgba(79,195,247,.12)}
.btn--quiet{--btn-bd:transparent;--btn-fg:var(--c-slate);padding-inline:6px}
.btn--quiet:hover{--btn-fg:var(--c-amber)}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{padding-block:20px}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:0;padding:0;list-style:none;font-size:13px;color:var(--c-slate)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--c-copper)}
.breadcrumb__item a{color:var(--c-slate)}
.breadcrumb__item a:hover{color:var(--c-amber)}
.breadcrumb__item[aria-current="page"]{color:var(--c-mist)}

/* ---------- 7. 卡片 / 面板 / 数字 / 标签 ---------- */
.card{
  position:relative;overflow:hidden;
  padding:clamp(20px,2.4vw,30px);
  border:1px solid var(--c-line-soft);border-radius:var(--radius-m);
  background:linear-gradient(160deg,rgba(18,43,74,.92),rgba(11,27,51,.94));
  transition:transform .28s ease,border-color .28s ease;
}
.card::before{
  content:"";position:absolute;inset:0 auto auto 0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--c-orange),var(--c-amber) 42%,rgba(255,179,71,0));
}
.card:hover{transform:translateY(-3px);border-color:var(--c-line)}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card__title{margin:0;font-family:var(--font-narrow);font-weight:700;font-size:19px;letter-spacing:.05em}
.card__body{margin:0;color:var(--c-slate)}
.card__foot{
  margin-top:18px;padding-top:14px;border-top:1px dashed var(--c-line-soft);
  font-size:14px;color:var(--c-slate);
}

.panel{
  padding:clamp(20px,2.6vw,34px);
  border:1px solid var(--c-line);border-radius:var(--radius-l);
  background:
    radial-gradient(120% 140% at 100% 0%,rgba(46,139,116,.18),rgba(46,139,116,0) 55%),
    rgba(18,43,74,.42);
}
.panel__label{display:block;margin-bottom:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--c-jade)}
.panel__note{margin:0;font-size:14px;color:var(--c-slate)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-mono);font-weight:700;line-height:1;font-size:clamp(28px,4vw,46px);color:var(--c-amber)}
.stat__label{font-size:13px;letter-spacing:.18em;color:var(--c-slate)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border:1px solid currentColor;border-radius:999px;
  font-family:var(--font-narrow);font-size:12px;letter-spacing:.14em;
  color:var(--c-slate);
}
.chip--amber{color:var(--c-amber)}
.chip--cyan{color:var(--c-cyan)}
.chip--jade{color:var(--c-jade)}
.chip--copper{color:var(--c-copper)}

/* ---------- 8. 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border:1px solid var(--c-line-soft);border-radius:var(--radius-l);
  background:
    radial-gradient(80% 70% at 20% 10%,rgba(79,195,247,.20),rgba(79,195,247,0) 60%),
    radial-gradient(70% 80% at 90% 90%,rgba(46,139,116,.24),rgba(46,139,116,0) 62%),
    linear-gradient(150deg,var(--c-night),#0A1729 70%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,27,51,0) 45%,rgba(11,27,51,.74));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--shear{clip-path:polygon(0 0,100% 4%,100% 100%,0 96%)}
.media-frame--plain::after{display:none}
.media-frame__caption{
  position:absolute;left:clamp(16px,2vw,26px);bottom:clamp(14px,2vw,22px);z-index:2;
  margin:0;font-size:13px;letter-spacing:.06em;color:var(--c-mist);
}

/* ---------- 9. 筛选条 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:10px;
  margin:0 0 clamp(18px,2.6vw,28px);padding:0;list-style:none;
}
.filter-btn{
  padding:9px 18px;border:1px solid var(--c-line-soft);border-radius:999px;
  background:rgba(18,43,74,.6);color:var(--c-slate);
  font-family:var(--font-narrow);font-size:14px;letter-spacing:.1em;
  cursor:pointer;transition:color .22s ease,background-color .22s ease,border-color .22s ease,transform .22s ease;
}
.filter-btn:hover{color:var(--c-mist);border-color:var(--c-line);transform:translateY(-2px)}
.filter-btn[aria-pressed="true"]{
  background:linear-gradient(135deg,var(--c-orange),var(--c-amber));
  color:#08152A;border-color:transparent;
}
.is-filtered-out{display:none !important}

/* ---------- 10. 滚动进度与返回顶部 ---------- */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;z-index:6;
  background:rgba(244,247,251,.08);pointer-events:none;
}
.scroll-progress > span{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--c-jade),var(--c-cyan),var(--c-amber),var(--c-orange));
}
.to-top{
  position:fixed;right:clamp(14px,2vw,30px);bottom:clamp(14px,2vw,30px);z-index:70;
  padding:12px 20px;border:1px solid var(--c-line);border-radius:999px;
  background:rgba(18,43,74,.94);color:var(--c-mist);
  font-family:var(--font-narrow);font-size:13px;letter-spacing:.18em;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,color .22s ease;
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--c-amber)}

/* ---------- 11. 渐显 ---------- */
html.js-ready [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .55s ease,transform .55s ease}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 12. 跳过链接 ---------- */
.skip-link{
  position:fixed;left:clamp(12px,3vw,32px);top:-120px;z-index:140;
  padding:12px 20px;border-radius:0 0 14px 14px;
  background:var(--c-amber);color:#08152A;
  font-family:var(--font-narrow);font-size:14px;letter-spacing:.12em;
  transition:top .22s ease;
}
.skip-link:focus{top:0;color:#08152A}

/* ---------- 13. 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-ink);
  box-shadow:0 12px 30px rgba(4,11,22,.38);
}
.rail-bar{background:var(--c-ink);border-bottom:1px solid var(--c-line-soft)}
.rail-bar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:40px;font-size:13px;color:var(--c-slate);
}
.rail-bar__note{margin:0;letter-spacing:.16em;color:var(--c-slate)}
.rail-bar__meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.rail-bar__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--c-copper)}
.rail-bar__mail{font-family:var(--font-mono);color:var(--c-mist);letter-spacing:.02em}
.rail-bar__link{color:var(--c-amber);border-bottom:1px solid transparent;padding-bottom:2px}
.rail-bar__link:hover{border-bottom-color:currentColor}

.nav-band{
  position:relative;
  background:linear-gradient(180deg,rgba(18,43,74,.96),rgba(18,43,74,.86));
  border-bottom:1px solid var(--c-line-cyan);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.nav-band__inner{
  display:flex;align-items:center;gap:clamp(16px,3vw,44px);
  min-height:74px;
}

.brand{display:flex;flex:0 0 auto;align-items:center;gap:12px;color:var(--c-mist)}
.brand:hover{color:var(--c-mist)}
.brand__mark{position:relative;width:38px;height:38px;flex:0 0 auto}
.brand__ring{
  position:absolute;inset:0;border-radius:50%;
  border:2px solid var(--c-copper);
  border-top-color:var(--c-orange);
  border-right-color:var(--c-cyan);
}
.brand__mark::after{
  content:"";position:absolute;inset:11px;border-radius:50%;
  background:var(--c-amber);box-shadow:0 0 14px rgba(255,179,71,.65);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-narrow);font-size:19px;font-weight:700;letter-spacing:.06em}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;color:var(--c-slate)}

.site-nav{margin-left:auto;display:flex;align-items:center;gap:clamp(12px,2vw,30px)}
.site-nav__list{display:flex;align-items:center;gap:clamp(4px,1.4vw,20px);margin:0;padding:0;list-style:none}
.site-nav__link{
  position:relative;display:inline-block;padding:8px 2px;
  color:var(--c-slate);font-size:15px;font-weight:500;letter-spacing:.04em;
  transition:color .22s ease;
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--c-orange),var(--c-amber));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .28s ease;
}
.site-nav__link:hover{color:var(--c-mist)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--c-amber)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__cta{padding:10px 20px;font-size:14px}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:10px 16px;border:1px solid var(--c-line);border-radius:999px;
  background:rgba(11,27,51,.6);color:var(--c-mist);
  font-family:var(--font-narrow);font-size:14px;letter-spacing:.16em;
  cursor:pointer;transition:border-color .25s ease,color .25s ease;
}
.nav-toggle:hover{border-color:var(--c-amber);color:var(--c-amber)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:2px;width:100%;background:currentColor;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  padding-top:clamp(44px,6vw,84px);
  background:var(--c-ink);
  border-top:1px solid var(--c-line);
}
.footer-glow{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(60% 70% at 8% 0%,rgba(46,139,116,.20),rgba(46,139,116,0) 60%),
    radial-gradient(48% 62% at 92% 12%,rgba(242,140,40,.16),rgba(242,140,40,0) 62%),
    radial-gradient(46% 46% at 50% 112%,rgba(79,195,247,.14),rgba(79,195,247,0) 70%);
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.3fr);
  gap:clamp(24px,3.4vw,56px);
  padding-bottom:clamp(32px,5vw,60px);
}
.footer-col{min-width:0}
.brand--footer{margin-bottom:16px}
.footer-lead{margin:0 0 14px;max-width:34ch;font-size:15px;color:var(--c-slate)}
.footer-beian{margin:0;font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--c-copper)}
.footer-title{
  margin:0 0 18px;padding-bottom:12px;
  border-bottom:1px solid var(--c-line-soft);
  font-family:var(--font-narrow);font-size:15px;font-weight:700;letter-spacing:.2em;
  color:var(--c-mist);
}
.footer-list{display:flex;flex-direction:column;gap:11px;margin:0;padding:0;list-style:none;font-size:15px}
.footer-list a{display:inline-block;color:var(--c-slate);transition:color .22s ease,transform .22s ease}
.footer-list a:hover{color:var(--c-amber);transform:translateX(4px)}
.footer-list--plain li{display:flex;flex-direction:column;gap:3px}
.footer-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--c-jade)}
.footer-val{font-size:15px;line-height:1.6;color:var(--c-mist)}
.footer-val--mono{font-family:var(--font-mono);letter-spacing:.02em}
.footer-base{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding-block:20px 30px;
  border-top:1px solid var(--c-line-soft);
  font-size:13px;color:var(--c-slate);
}
.footer-base p{margin:0}
.footer-base [data-year]{font-family:var(--font-mono);color:var(--c-amber)}
.footer-base__note{color:var(--c-copper)}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1060px){
  .rail-bar__note{display:none}
  .nav-toggle{display:inline-flex}
  .nav-band__inner{min-height:66px}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;z-index:8;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:8px 0 20px;
    background:rgba(11,27,51,.99);
    border-top:1px solid var(--c-line-soft);
    border-bottom:1px solid var(--c-line);
    box-shadow:var(--shadow-lift);
    max-height:calc(100vh - 110px);overflow-y:auto;
  }
  .site-nav[data-open]{display:flex}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .site-nav__list li{border-bottom:1px solid var(--c-line-soft)}
  .site-nav__link{display:block;padding:15px var(--gutter);font-size:16px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(242,140,40,.18),rgba(242,140,40,0));
    color:var(--c-amber);
  }
  .site-nav__cta{margin:16px var(--gutter) 4px;justify-content:center}
}

@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:760px){
  body{font-size:16px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .rail-bar__meta{gap:10px;font-size:12px}
  .rail-bar__label{display:none}
  .rail-bar__mail{font-size:12px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-col--brand{grid-column:auto}
}

@media (max-width:600px){
  .brand__sub{display:none}
  .nav-toggle__label{display:none}
  .to-top{padding:11px 16px;letter-spacing:.12em}
}

/* ---------- 16. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover,.filter-btn:hover{transform:none}
}